IDL: Add build target for IDL dictionary impl generation in core

Source/bindings/scripts/utilities.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Utility functions (file reading, simple IDL parsing by regexes) for IDL build.
 
 Design doc: http://www.chromium.org/developers/design-documents/idl-build
 """
 
 import os
 import cPickle as pickle
 import re
 import string
+import subprocess
 
 
 class IdlBadFilenameError(Exception):
     """Raised if an IDL filename disagrees with the interface name in the file."""
     pass
 
 
 def idl_filename_to_interface_name(idl_filename):
     # interface name is the root of the basename: InterfaceName.idl
     return os.path.splitext(os.path.basename(idl_filename))[0]
 
 
 ################################################################################
 # Basic file reading/writing
 ################################################################################
 
 def get_file_contents(filename):
     with open(filename) as f:
         return f.read()
 
 
 def read_file_to_list(filename):
     """Returns a list of (stripped) lines for a given filename."""
     with open(filename) as f:
         return [line.rstrip('\n') for line in f]
 
 
+def resolve_cygpath(cygdrive_names):
+    if not cygdrive_names:
+        return []
+    cmd = ['cygpath', '-f', '-', '-wa']
+    process = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    idl_file_names = []
+    for file_name in cygdrive_names:
+        process.stdin.write('%s\n' % file_name)
+        process.stdin.flush()
+        idl_file_names.append(process.stdout.readline().rstrip())
+    process.stdin.close()
+    process.wait()
+    return idl_file_names
+
+
+def read_idl_files_list_from_file(filename):
+    """Similar to read_file_to_list, but also resolves cygpath."""
+    with open(filename) as input_file:
+        file_names = sorted([os.path.realpath(line.rstrip('\n'))
+                             for line in input_file])
+        idl_file_names = [file_name for file_name in file_names
+                          if not file_name.startswith('/cygdrive')]
+        cygdrive_names = [file_name for file_name in file_names
+                          if file_name.startswith('/cygdrive')]
+        idl_file_names.extend(resolve_cygpath(cygdrive_names))
+        return idl_file_names
+
+
 def read_pickle_files(pickle_filenames):
     for pickle_filename in pickle_filenames:
         with open(pickle_filename) as pickle_file:
             yield pickle.load(pickle_file)
 
 
 def write_file(new_text, destination_filename, only_if_changed):
     if only_if_changed and os.path.isfile(destination_filename):
         with open(destination_filename) as destination_file:
             if destination_file.read() == new_text:
                 return
+    destination_dirname = os.path.dirname(destination_filename)
+    if not os.path.exists(destination_dirname):
+        os.makedirs(destination_dirname)
     with open(destination_filename, 'w') as destination_file:
         destination_file.write(new_text)
 
 
 def write_pickle_file(pickle_filename, data, only_if_changed):
     if only_if_changed and os.path.isfile(pickle_filename):
         with open(pickle_filename) as pickle_file:
             try:
                 if pickle.load(pickle_file) == data:
                     return
@@ skipping 105 matching lines @@
 
 def get_put_forward_interfaces_from_idl(file_contents):
     put_forwards_pattern = (r'\[[^\]]*PutForwards=[^\]]*\]\s+'
                             r'readonly\s+'
                             r'attribute\s+'
                             r'(\w+)')
     return sorted(set(match.group(1)
                       for match in re.finditer(put_forwards_pattern,
                                                file_contents,
                                                flags=re.DOTALL)))